The Globe and Mail reports in its Friday edition that the troubled state of the North American free-trade agreement has eroded business investment in Canada. The Globe's guest columnist Pedro Antunes writes that because access to American consumers is at risk, investment dollars have favoured the U.S. rather than Canada. As well, the uncertainty created by the future of the energy sector because of Canada's inability to reach global markets, and business investment over all is likely to stay below what is needed to pick up the pace of growth. Prior to 2015, business investment as a share of GDP was on par with the U.S., at about 13.5 per cent. Currently, the U.S. share has remained steady, while Canada's share has collapsed to 11.6 per cent -- about $44-billion (U.S.) in additional investment would be needed to put Canada back on par. While business investment posted strong gains of late, the level of investment is currently barely above what is required to replace depreciated assets. The policy whims loosely expressed in presidential tweets have slowly translated into an economic agenda that could punish Canada. Mr. Antunes says the time frame to preserve Canada's access to the U.S. market seems to be shrinking.